<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>事件委托-Tab栏</title>
</head>

<style type="text/css">
    * {
        margin: 0;
        padding: 0;
    }

    ul {
        list-style: none;
    }

    .wrapper {
        width: 1000px;
        height: 475px;
        margin: 0 auto;
        margin-top: 100px;
    }

    .tab {
        border: 1px solid #ddd;
        border-bottom: 0;
        height: 36px;
        width: 320px;
    }

    .tab li {
        position: relative;
        float: left;
        width: 80px;
        height: 34px;
        line-height: 34px;
        text-align: center;
        cursor: pointer;
        border-top: 4px solid #fff;
    }

    .tab span {
        position: absolute;
        right: 0;
        top: 10px;
        background: #ddd;
        width: 1px;
        height: 14px;
        overflow: hidden;
    }

    .products {
        width: 1002px;
        border: 1px solid #ddd;
        height: 476px;
    }

    .products .main {
        float: left;
        display: none;
    }

    .products .main.active {
        display: block;
    }

    .tab li.active {
        border-color: red;
        border-bottom: 0;
    }
</style>
</head>

<body>
    <div class="wrapper">
        <ul class="tab">
            <li class="tab-item active" data-id="0">国际大牌<span>◆</span></li>
            <li class="tab-item" data-id="1">国妆名牌<span>◆</span></li>
            <li class="tab-item" data-id="2">清洁用品<span>◆</span></li>
            <li class="tab-item" data-id="3">男士精品</li>
        </ul>
        <div class="products">
            <div class="main active">
                <a href="###"><img src="../images/guojidapai.jpg" alt="" /></a>
            </div>
            <div class="main">
                <a href="###"><img src="../images/guozhuangmingpin.jpg" alt="" /></a>
            </div>
            <div class="main">
                <a href="###"><img src="../images/qingjieyongpin.jpg" alt="" /></a>
            </div>
            <div class="main">
                <a href="###"><img src="../images/nanshijingpin.jpg" alt="" /></a>
            </div>
        </div>
    </div>

    <script>
        // 获取标签
        const ul = document.querySelector('ul');
        const main = document.querySelectorAll('.main');
        // 注册绑定委托事件
        ul.addEventListener('click', function (e) {
            if (e.target.classList.contains('tab-item')) {
                document.querySelector('.tab .active').classList.remove('active');
                e.target.classList.add('active');
                const index = e.target.dataset.id;
                document.querySelector('.products .active').classList.remove('active');
                main[index].classList.add('active');
            };
        });
    </script>


</body>

</html>